The body of ddebug_attach_module_classes() is just a code-block that finds the contiguous subrange of classmaps matching on modname, and saves it into the ddebug_table's info record.
Implement this block in a macro to accommodate different component vectors in the "box" (as named in the for_subvec macro). We will reuse this macro shortly. And hoist its invocation out of ddebug_attach_module_classes() up into ddebug_add_module(). This moves the filtering step up closer to dynamic_debug_init(), which already segments the builtin pr_debug descriptors on their mod_name boundaries. Signed-off-by: Jim Cromie <[email protected]> Reviewed-by: Louis Chauvet <[email protected]> --- v2: move RvB after SoB finish hoist - drop old fn - ddebug_attach_module_classes the v1 rev left the old ddebug_attach_module_classes in place, but it is completely redundant now, since it already lost the list-linking job it was doing. It was being cut out later in the patchset (in the unsent API adaptation phase), but for cleaner review, lets excise it now. OLD all-in-1-series (pre split into reviewable chunks) v10?- reordered params to match kdoc v12- refactor/rename: s/dd_mark_vector_subrange/dd_set_module_subrange/ 1. Renamed the macro from dd_mark_vector_subrange to dd_set_module_subrange to better reflect its purpose of narrowing a vector to a module-specific subrange. 2. Simplified the arguments by removing the redundant _dst, as the _di pointer already provides access to the target _ddebug_info struct. 3. Refactored for Clarity: Instead of overwriting the struct's start pointer while the for_subvec loop is using it to iterate, I introduced a temporary __start variable. This avoids the "subtle" side effect and makes the logic easier to follow. 4. Updated Documentation: Improved the comment block to explicitly state that the macro scans for the first match and counts contiguous elements. --- lib/dynamic_debug.c | 65 +++++++++++++++++++++++++++-------------------------- 1 file changed, 33 insertions(+), 32 deletions(-) diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 4a9b9bc9efc5..b877f4c6d778 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -162,8 +162,8 @@ static void vpr_info_dq(const struct ddebug_query *query, const char *msg) } static struct _ddebug_class_map *ddebug_find_valid_class(struct ddebug_table const *dt, - const char *class_string, - int *class_id) + const char *class_string, + int *class_id) { struct _ddebug_class_map *map; int i, idx; @@ -1166,34 +1166,34 @@ static const struct proc_ops proc_fops = { .proc_write = ddebug_proc_write }; -static void ddebug_attach_module_classes(struct ddebug_table *dt, struct _ddebug_info *di) -{ - struct _ddebug_class_map *cm; - int i, nc = 0; - - /* - * Find this module's classmaps in a subrange/wholerange of - * the builtin/modular classmap vector/section. Save the start - * and length of the subrange at its edges. - */ - for_subvec(i, cm, di, maps) { - if (!strcmp(cm->mod_name, dt->info.mod_name)) { - if (!nc) { - v2pr_info("start subrange, class[%d]: module:%s base:%d len:%d ty:%d\n", - i, cm->mod_name, cm->base, cm->length, cm->map_type); - dt->info.maps.start = cm; - } - nc++; - } else if (nc) { - /* end of matching classmaps */ - break; - } - } - if (nc) { - dt->info.maps.len = nc; - vpr_info("module:%s attached %d classes\n", dt->info.mod_name, nc); - } -} +/* + * Narrow a _ddebug_info's vector (@_vec) to the contiguous subrange + * of elements where ->mod_name matches @__di->mod_name. + * + * This scans the @_di->_vec for the first element matching the module + * name, and counts contiguous matches to define the subrange. + * + * @_i: caller-provided index var + * @_sp: cursor into @_vec + * @_di: pointer to the struct _ddebug_info to be narrowed + * @_vec: name of the vector member (must have .start and .len) + */ +#define dd_set_module_subrange(_i, _sp, _di, _vec) ({ \ + struct _ddebug_info *__di = (_di); \ + typeof(__di->_vec.start) __start = NULL; \ + int __nc = 0; \ + for_subvec(_i, _sp, __di, _vec) { \ + if (!strcmp((_sp)->mod_name, __di->mod_name)) { \ + if (!__nc++) \ + __start = (_sp); \ + } else if (__nc) { \ + break; /* end of consecutive matches */ \ + } \ + } \ + if (__nc) \ + __di->_vec.start = __start; \ + __di->_vec.len = __nc; \ +}) /* * Allocate a new ddebug_table for the given module @@ -1202,6 +1202,8 @@ static void ddebug_attach_module_classes(struct ddebug_table *dt, struct _ddebug static int ddebug_add_module(struct _ddebug_info *di) { struct ddebug_table *dt; + struct _ddebug_class_map *cm; + int i; if (!di->descs.len) return 0; @@ -1223,8 +1225,7 @@ static int ddebug_add_module(struct _ddebug_info *di) INIT_LIST_HEAD(&dt->link); - if (di->maps.len) - ddebug_attach_module_classes(dt, di); + dd_set_module_subrange(i, cm, &dt->info, maps); mutex_lock(&ddebug_lock); list_add_tail(&dt->link, &ddebug_tables); -- 2.54.0
